Quarterly report pursuant to Section 13 or 15(d)

Net Income (Loss) Per Share - Schedule of Earnings Per Share, Basic and Diluted (Detail)

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Net Income (Loss) Per Share - Schedule of Earnings Per Share, Basic and Diluted (Detail) (USD $)
In Thousands, except Per Share data, unless otherwise specified
3 Months Ended 9 Months Ended
Oct. 31, 2013
Oct. 31, 2012
Oct. 31, 2013
Oct. 31, 2012
Earnings Per Share [Abstract]        
Net income (loss) from continuing operations - basic $ 798 $ (337) $ (879) $ (8,722)
Net (loss) income from discontinued operations - basic and diluted (221) 211 (744) (16,979)
Net income (loss) $ 577 $ (126) $ (1,623) $ (25,701)
Weighted average shares used in computing income (loss) per share - basic 32,813 32,474 32,636 32,554
Dilutive potential common stock equivalents 782 521 849 533
Weighted average shares used in computing income (loss) per share - diluted 33,595 32,995 33,485 33,087
Net income (loss) per share - basic:        
Income (loss) from continuing operations $ 0.02 $ (0.01) $ (0.03) $ (0.27)
(Loss) income from discontinued operations $ 0.00 $ 0.01 $ (0.02) $ (0.52)
Net income (loss) per share - basic $ 0.02 $ 0.00 $ (0.05) $ (0.79)
Net income (loss) per share - diluted:        
Income (loss) from continuing operations $ 0.02 $ (0.01) $ (0.03) $ (0.27)
(Loss) income from discontinued operations $ 0.00 $ 0.01 $ (0.02) $ (0.52)
Net income (loss) per share - diluted $ 0.02 $ 0.00 $ (0.05) $ (0.79)